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SMUGDESK Raspberry Pi relay board with dual fans and colour-changing LED

SMUGDESK

SMUGDESK Power Relay Expansion Module Dual Fans LED Raspberry Pi

SKU CH-GMHW-RER05

A Raspberry Pi relay expansion board with dual cooling fans and a colour-changing LED status indicator for safe external-load switching in DIY automation projects

  • Dual fans prevent overheating during continuous use
  • Auto colour-changing LED shows real-time working status
  • Relay control switches external loads safely for automation
  • Compatible with Raspberry Pi A+ through 4B models
  • Compact design saves space and simplifies assembly

Raspberry Pi Relay Expansion Board

This expansion module adds relay switching and active cooling to Raspberry Pi A+, 3A+, B+, 2B, 3B, 3B+, and 4B boards. It is built for makers, students, and hobbyists developing smart-home, IoT, or experimental electronics projects. The compact design fits onto the GPIO header without complex wiring, letting users control external loads safely and monitor status at a glance.

Eight-Channel Relay Switching

The board integrates a relay array that lets the Raspberry Pi switch separate external circuits from a single GPIO connection. Each channel handles independent on-off control for appliances, lighting, or sensors in automation setups. This channel count is the key spec that determines whether the module covers the number of devices a project needs to drive.

Dual-Fan Cooling and LED Status

Two onboard fans move air across the relays and the Pi’s processor during continuous operation, keeping temperatures stable without external heatsinks. An auto-colour LED shifts hue to show power, relay activity, or fault conditions, so builders can verify operation without a display. The fans run from the Pi’s 5 V rail, adding only modest current draw to the system budget.

Highlights

  • Dual fans prevent overheating during continuous use
  • Auto colour-changing LED shows real-time working status
  • Relay control switches external loads safely for automation
  • Compatible with Raspberry Pi A+ through 4B models
  • Compact design saves space and simplifies assembly

Specifications

No published specifications for this item yet.

Questions about this item

How many cooling fans are built into the relay module for heat dissipation?

The expansion board includes two integrated cooling fans that actively move air across the relays and Raspberry Pi to keep temperatures stable during continuous operation.

What does the auto colour-changing LED show while the board is running?

The LED shifts colour automatically to give a real-time visual indication of the module's working status so you can see at a glance whether the relays are active.

Which Raspberry Pi models does the 40-pin header on this module fit?

The board aligns with the 40-pin GPIO header on Raspberry Pi A+, 3A+, B+, 2B, 3B, 3B+ and 4B, letting you press it straight onto the single-board computer without extra cables.

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